Daisangen

Daisangen
Type	Yakuman
Kanji	大三元
English	Big three dragons
Value	Yakuman
Speed	Slow
Difficulty	Hard

Daisangen 「大三元」 is a standard yakuman. This involves the collection of all three tile groups of the sangenpai (dragon tiles). It is one of the three yakuman gosanke 「役満御三家」, or "the three big families of yakuman".

Tile pattern

Agari:

Note: This hand is also winnable with

, but this hand would be shousangen instead.

Development

As the name implies, this yakuman depends on all three dragons. In the event where one dragon type is not available as a tiplet, then this yakuman is no longer possible.

Sekinin barai

Main article: Sekinin barai

The rule of 'sekinin barai applies to daisangen in the form of yakuman pao. This occurs when a player seeking to develop this yakuman already had made open calls (pon) with two out of the three possible dragon types; and then the same player has taken the opportunity to call on the third dragon type. The player who discarded the third type then becomes liable for that play, where an seemingly obvious threat to a yakuman had become an apparent and actual threat of a yakuman.